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Removal of CO from Reformed Fuel by Shift Reaction and Selective Oxidation 2000-01-2008

Cu-based and noble metal catalysts for CO removal from methanol reformed gas were investigated for application to polymer electrolyte fuel cells. Over Cu-based catalysts, Oxygen-assisted low-temperature CO shift reaction (combined shift reaction and CO oxidation) enhanced CO removal considerably by the addition of a small amount of oxygen. While the Cu/Al2O3-ZnO catalyst exhibited a comparable activity with noble metal catalysts at low CO concentration, it demonstrated a higher activity than Pt/Al2O3 at high CO concentration.